The typical BMW 328i uses two camshaft position sensors—one for the intake camshaft and one for the exhaust camshaft—inside its dual-cam (DOHC) engine. These sensors provide precise timing data to the engine control unit and VANOS systems.
Understanding what a camshaft position sensor does
A camshaft position sensor monitors the position and speed of the camshafts so the engine control unit can manage ignition timing, fuel injection, and variable valve timing. In a DOHC setup like the 328i’s, there are usually separate sensors for each camshaft to ensure accurate timing information for both intake and exhaust events.
Standard setup across common 328i generations
In typical 328i configurations across generations, you will find two camshaft position sensors, aligned with the two camshafts in the engine. This layout supports precise timing control essential for smooth operation and performance.
- One camshaft position sensor monitors the intake camshaft.
- One camshaft position sensor monitors the exhaust camshaft.
In practice, this dual-sensor arrangement is the standard for most BMW 328i engines, including popular inline-6 and turbocharged variants used in various model years.
Where to locate the sensors on a typical 328i
Both sensors are mounted on or near the top of the cylinder head and the timing cover area. They are positioned to read the timing gear or a reluctor wheel on each camshaft, with connectors routed toward the engine control wiring harness.
- Intake cam sensor: located toward the intake side of the head, reading the intake camshaft position.
- Exhaust cam sensor: located toward the exhaust side of the head, reading the exhaust camshaft position.
Access usually requires removing some engine cover components, but both sensors are designed for replacement without major disassembly in most models.
If you only see one camshaft sensor
Two sensors are the standard, but if a technician indicates only one is present, verify your engine code and the specific model year, as variants can differ by generation or market. In the vast majority of BMW 328i configurations, you should expect two camshaft position sensors.
Bottom line
For the typical BMW 328i, count two camshaft position sensors—one for each camshaft (intake and exhaust). Always confirm with your vehicle’s engine code and the official BMW parts catalog if you’re unsure about a particular model year or market.
Summary
Most BMW 328i models employ two camshaft position sensors to monitor both camshafts in a DOHC engine. This dual-sensor setup helps deliver accurate timing data for ignition, fuel delivery, and VANOS operation. If you’re unsure about your specific car, check the engine code and consult the official service documentation or a qualified BMW technician.
How much is a camshaft position sensor for a BMW 328I?
The BMW 328I camshaft position sensor itself sits between $40 and $120, depending whether you pick original or aftermarket.
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How many camshaft position sensors does a BMW 328I have?
Or P0015. And since there is two sensors. And they're the exact. Same part number we can easily troubleshoot to see what our issue is by simply grabbing one of the sensors. Uninstalling.
Where is the camshaft position sensor on a BMW 328I?
Bit. Slide it down we'll disconnect the connector. It's a little tab right there i'm just going to use a pick get under the tab. Slide the connector.
How can I tell which camshaft sensor is bad?
How To Check if a Camshaft Position Sensor is Bad?
- Step 1: Check for Diagnostic Trouble Codes. A faulty CMP sensor will typically set one or more DTCs on vehicles model year 1996 or newer.
- Step 2: Perform a Visual Inspection. Next, you can move on to performing a visual inspection.
- Step 3: Test the Sensor Directly.
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